JP2014134017A - Vibration-proof bearing wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proof bearing wall structure which is a flexible structure, which can resist even second and subsequent earthquakes including aftershocks, and which can suppress and relax a shock, an impact and a deterioration in earthquake resistance by vibration proofness of a vibration-proof implement attached to a fixing part of a face material, when being subjected to the shock, the impact and deformation, caused by the earthquakes.SOLUTION: In a vibration-proof bearing wall structure 1 in which a face material 3 is arranged on at least one surface of a frame-like part 2 in a structural skeleton and fixed by a fixing material 4, a vibration-proof implement 5 made of a vibration-proof material is interposed between the face material 3 and the fixing material 4.

Description

  The present invention relates to a vibration-proof load-bearing wall structure, and in particular, absorbs and relaxes vibrations and shocks to suppress seismic deterioration of the fastening portion of the load-bearing wall, and in the case of the first earthquake, of course, The present invention relates to a flexible anti-vibration load-bearing wall structure that can withstand aftershocks and new second and subsequent earthquakes.

  In recent years, awareness of disaster prevention has increased rapidly due to the frequent occurrence of huge earthquakes around the world, and as part of this, there has been a strong awareness of improving the earthquake resistance of houses, and measures to strengthen earthquake resistance and seismic reinforcement have been promoted. The seismic performance is required to have a certain rigidity defined by the wall magnification in accordance with the Building Standards Law.

However, in rigid structures based on the current earthquake resistance standards, if the load bearing wall is subjected to a force (deformation), impact or vibration exceeding the plastic limit, the fastening part (bearing face material, nails, etc.) will be intensively damaged. It is easy to cause fatal earthquake-resistant deterioration due to breakage, and even if it can withstand the first earthquake, it cannot withstand subsequent aftershocks or new second and subsequent earthquakes, and there is a fear that it will eventually collapse. There is always anxiety about staying in these high-risk buildings. Furthermore, it is a public institution that earthquake-proof houses (earthquake-resistance grades 1 and 2) that are originally seismic-designed with a seismic intensity of about 7 can be fatally damaged or destroyed in an actual vibration test (seismic intensity of about 6) that is equivalent to the Great Hanshin Earthquake. As a result, the magnitude of the dissociation difference between the design value and the actual damage becomes clear, and it is strongly desired to solve the problems of these earthquake-resistant houses. Therefore, some attempts have been made to absorb vibrations and shocks using a cushioning material such as rubber.
For example, in Patent Document 1, in a structure such as a house, the upper part has a threaded part, a buffer cylinder such as rubber is attached, and the bent part provided in the lower part is embedded in each concrete foundation. Using a support rod, the buffer cylinder penetrating vertically in the base of the structure disposed on the upper surface of the foundation is fitted and fastened with a washer or nut to transmit from the foundation to the structure (base) There has been proposed a vibration damper that relieves vibrations such as earthquakes.
Tightened structure in which the shock absorber that vertically penetrates the foundation is arranged between the foundation and the foundation is the phenomenon of floating / separation between the foundation and the foundation, which is the main cause of the house collapse of the Hanshin Awaji earthquake, It is not necessary to look at the phenomenon of squeezing between the foundation and the pillar, and the building standard law after the earthquake will make the foundation and foundation tightly integrated, and the pillar, foundation and foundation tightly integrated (installation of the hall down = hozo) As is clear from the circumstances that obstruction prevention is required, providing a vertical buffer cylinder between the foundation and the foundation on which the entire load of the building is loaded is a structure that is a foundation (heavy foundation) ) And the horizontal and vertical tight integration are lost, not only the shock absorbing properties that the buffer cylinders should originally exhibit, but also a new starting point for amplifying the multi-dimensional vibration of the building. The foundation and soil that should be avoided most as a countermeasure against earthquakes It is one of Tightened structure between.

Further, in Patent Document 2, a wall assembly having a frame body in which vertical members and cross members are assembled into a rectangle and a face member attached to the frame member, and an upper structure and a lower structure are tightly integrated with each other. A bolt that penetrates the cross member in the vertical direction, a nut that fixes the bolt, an elastic member attached between the cross member and the nut, and / or the cross member, the upper structure, and the lower structure By disposing an elastic member attached between the body and the elastic member, the elastic deformation of the elastic member allows the entire frame to be displaced, or absorbs a horizontal shear force exceeding the limit of the frame and improves toughness. .
Originally, the wall assembly method is a monocoque structure, and further, the wall assembly, the upper structure, and the lower structure have a tightly integrated structure, thereby exhibiting earthquake resistance.
On the other hand, in Patent Document 2, by arranging an elastic member between a bolt and a nut penetrating the cross member in the vertical direction, or between the cross member and the upper structure and the lower structure, for example, FIG. As shown in FIG. 1 (b), during an earthquake, large elastic deformation gaps are generated in the positive and negative directions between the wall assembly and the upper structure and the lower structure. The numerical value obtained by adding the elastic deformation amount to the structure becomes the displacement angle (swing width) of the building and further expands at the upper floor. Furthermore, it can be easily inferred that these positive and negative elastic deformations can cause and amplify the shaking phenomenon.
As in this Patent Document 2, the interposition of a layered elastic body (rubber etc.) in either the vertical direction (vertical direction) of a building depends on the height and weight of the building. It is logically explained that the effect of expanding and shaking the shaking is greater than the effect of absorbing the shaking, and the earthquake resistance is also lowered. Actually, the load bearing wall structure of Cited Document 2 is not practically implemented in the market.
Therefore, in order to solve these essential problems of earthquake-resistant houses, so-called seismic isolation structures that receive earthquake vibrations and damping structures that absorb and attenuate earthquake kinetic energy have been proposed.

However, the seismic isolation structure is provided with a mechanism for mechanically insulating the ground and the building at the base of the building, but it is very expensive and cannot be generally used.
The seismic control structure collects and attenuates horizontal deformation applied to the house in a few seismic control mechanisms provided on a specific bearing wall (Non-Patent Documents 1 and 2). It is a rigid structure similar to a normal earthquake-resistant house, and it is unsuitable as a structure that transmits and concentrates horizontal positive and negative deformations to the vibration control mechanism in real time, and the vibration control effect is questioned. If plastic deformation occurs, it will not be able to fundamentally solve the shortcomings of current seismic houses that cannot withstand the subsequent aftershocks and the second and subsequent earthquake motions and impacts.

JP-A 61-53966 Japanese Patent Laid-Open No. 11-14120

Sekisui House Co., Ltd. Pamphlet “Sekisui House Original Minister-approved“ Vibration Control Structure ”SHEQAS Seismic Energy Absorption System Seacus” Nice Co., Ltd. pamphlet “No more fear of a big earthquake”

  In view of such circumstances, the present invention is a flexible anti-vibration load-bearing wall structure in which the load-bearing wall itself can be elastically deformed and elastically restored, and, like conventional load-bearing walls, conforms to the static stress test method prescribed by law. It has a rigid strength that clears the load-bearing wall amount (earthquake resistance grades 1 to 3), and at the time of an actual earthquake disaster, it can perform dynamic deformation (force), vibration, impact, etc. with its own elastic deformability and elasticity. Absorb, mitigate, suppress and mitigate shaking, shock and earthquake resistance degradation. In addition, an object of the present invention is to provide a vibration-proof bearing wall structure that can withstand aftershocks and new second and subsequent earthquakes.

  The present invention has been made in order to achieve the above object, and the feature of the present invention is that, for example, a load bearing surface material is applied to at least a part or the entire surface of a frame-like portion in a structural frame made of a shaft assembly method or the like. The structure is a load-bearing wall structure that is installed and fastened with a fastening material, and includes a vibration-proof load-bearing wall structure in which a vibration-proofing tool made of a vibration-proof material is interposed between the face material and the fastening material. .

  Another feature of the present invention is that the face material is provided with a mounting hole for mounting the vibration isolator, and the fastening material penetrates the vibration isolator mounted in the mounting hole and the face material and the frame-shaped portion. The above-described anti-vibration load-bearing wall structure that is configured to be attached is included.

  Still another feature of the present invention is the above-described anti-vibration load-bearing wall structure in which the vibration isolator has a tapered shape that is smaller than the diameter of the mounting hole on the bottom surface side and larger than the diameter of the mounting hole on the upper surface side. .

  Still another feature of the present invention is the above-described anti-vibration load-bearing wall structure in which a flange larger than the diameter of the mounting hole is provided on the upper surface side of the anti-vibration tool.

  Still another feature of the present invention is the above-described anti-vibration load-bearing wall structure in which the vibration isolator is tapered on the bottom surface side and large on the upper surface side, and the mounting hole is tapered to fit the vibration isolator. And

  Still another feature of the present invention is that the vibration-proof material is made of a vibration-proof material made of synthetic rubber such as butyl rubber or silicone rubber, natural rubber, elastomer resin, foamed synthetic resin, or a composite of these. The content is a wall structure.

  Still another feature of the present invention is for a vibration-proof load-bearing wall structure comprising: a face member having a mounting hole drilled therein; and a vibration isolator made of a vibration isolating material that is integrally mounted in the mounting hole. Anti-vibration surface material is included.

  Still another feature of the present invention includes a vibration isolator made of a vibration isolating material and an anti-vibration adhesive for a vibration-proof load-bearing wall structure made of a fastening material penetrating the vibration isolator.

  Still another feature of the present invention is the above-described anti-vibration fixing material in which an outer shell portion made of a hard member is provided on the peripheral portion of the anti-vibration device.

The vibration-proof bearing wall structure of the present invention is a fastening structure (hereinafter referred to as a fastening part) in which a vibration-proofing tool is interposed between the face material fastened to the frame-like part and the fastening material. Therefore, deformation and vibration energy transmitted from the frame material connected to the foundation due to an earthquake etc. to the face material are absorbed by the elastic deformation and stress dispersibility of the vibration isolator, and the face material like a conventional bearing wall Will not tear or the fastening material will not break. In addition, due to the elastic resiliency of the vibration isolator, it immediately returns to its original shape, functions against repeated deformation, vibration, and shock, and suppresses and mitigates shaking and shock, and prevents seismic deterioration of the fastening part. Suppress. Therefore, even aftershocks and new second and subsequent earthquakes, the same function as the first time can be maintained and excellent vibration isolation can be exhibited.
In addition, the vibration-proofing and vibration-proofing property as used in the present invention means that a vibration-proofing tool is interposed between the face material and the fastening material to disperse deformation, vibration, shock, etc. transmitted from the frame-shaped part. It refers to suppressing and mitigating earthquake shaking and impact by elastic deformation and elastic recovery, and preventing and suppressing seismic deterioration of the fastening part (face material and fastening material).

  In addition, by drilling a mounting hole in the face material and attaching the vibration isolator to the mounting hole, and then penetrating and fixing the vibration isolator with the fastening material, the face material is secured to the frame-shaped part. It is preferable because the workability of the vibration-proof bearing wall at the construction site is improved. Drilling of the mounting hole and mounting of the vibration isolator to the mounting hole may be carried out intensively in the face material manufacturing process or the construction shop.

  If the shape of the vibration isolator is tapered smaller than the diameter of the mounting hole on the bottom surface side and larger than the diameter of the mounting hole on the upper surface side, the vibration isolator can be easily attached to the mounting hole, and the face material will fall off. And effective vibration isolation can be demonstrated.

  If the collar is provided on the upper surface side of the vibration isolator, the collar is engaged with the surface of the face material even when the bearing wall is greatly deformed and the face material is lifted from the frame-shaped part. The anti-vibration device attached to the body will not come off the face material, so it will absorb vibrations and shocks and return to its original shape. The same applies to the case where the vibration isolator and the mounting hole are tapered and the vibration isolator can be fitted into the mounting hole.

  If the vibration isolator is installed in the face material mounting hole in advance as a vibration isolating surface material, it can be attached to the frame in the structural frame in the same way as a normal face material. A structure can be obtained.

If the anti-vibration tool and the fastening material are previously integrated as an anti-vibration fastening material by penetrating the anti-vibration tool with the fastening material, a mounting hole is drilled in the face material and the anti-vibration fastening material A vibration-proof and load-bearing wall structure can be obtained simply by driving in. This anti-vibration attachment material is used for anti-vibration by drilling a mounting hole with a woodworking horuseau without disassembling the existing load-bearing wall in the case of seismic reform that gives vibration-proof properties to the existing load-bearing wall. It is useful in that a vibration-proof and load-bearing wall structure can be obtained by placing a dressing.
At this time, if a vibration isolator having an outer shell portion made of a hard member is used at the peripheral edge of the vibration isolator, mounting in the mounting hole is facilitated.

Fig.1 (a) is a schematic front view which shows an example of the vibration-proof bearing wall structure of this invention, (b) is the AA sectional drawing. 2A to 2D are schematic cross-sectional views showing other examples of the shape of the vibration isolator. Fig.3 (a) is a schematic front view which shows the example of a vibration-proof surface material, (b) is the BB sectional drawing. 4A to 4E are schematic cross-sectional views showing examples of vibration-proofing attachments. FIG. 5 is a front view showing an example of a vibration-proof bearing wall. 6A is a front view showing an outline of a simulated vibration test method (dynamic test method), and FIG. 6B is a schematic cross-sectional view showing the connection between the foundation and the vibration-proof bearing wall or the conventional bearing wall. It is. FIGS. 7A and 7B are front views showing an example in which a face material is provided in a part of the frame-like portion. FIG. 8A is a schematic cross-sectional view showing an example of a fastening structure using a pushing fixture, and FIG. 8B is an explanatory view showing an example of a pushing fastening material. Fig.9 (a) is a front view which shows an example of the vibration-proof load-bearing wall using a strip | belt-shaped vibration isolator, (b) is the CC sectional drawing.

  The anti-vibration load-bearing wall structure 1 of the present invention is formed, for example, as shown in FIG. 1 by disposing a face material 3 on at least one surface of a frame-like portion 2 in a structural housing and fastening it with a fastening material 4. The bearing wall structure is characterized in that a vibration isolator 5 made of a vibration isolating material is interposed between the face material 3 and the fastening material 4.

As shown in FIG. 1A, the vibration-proof bearing wall structure 1 of the present invention relates to a bearing wall structure in which a face member 3 is fixed to a frame-like portion 2 of a structural housing.
In the present invention, the frame-like portion 2 means, for example, a portion that is surrounded by the beam 2a, the column 2b, the base 2c, the inter-column 2d, and the like in a wooden frame structure (construction) method.
The anti-vibration load-bearing wall structure 1 of the present invention can also be used in the case of a wooden frame structure (construction) method, steel frame construction, or the like. Moreover, even if the fastening structure of the vibration-proof bearing wall is used in combination with the fastening structure of the present invention and the structure in which the conventional face material is fastened with the fastening material, the effect of the vibration-proof bearing wall is exhibited. It can employ | adopt suitably from the relationship with the wall magnification calculated | required. In addition, the anti-vibration bearing wall and the conventional bearing wall may be mixed as appropriate, and in that case, if the anti-vibration bearing wall is arranged on both the entrance and exit corners and the opening of the building, which is most susceptible to damage. More desirable. In addition, if a predetermined wall magnification cannot be secured due to the building structure, a well-balanced seismic design can be achieved by adopting a vibration-proof bearing wall as the partition wall.
Furthermore, by adopting this anti-vibration bearing wall as a vibration control device instead of the conventional vibration control device, the problems of the current vibration control device described above are solved, and without introducing an expensive vibration control device. An inexpensive seismic control device can be manufactured and installed at the construction site regardless of whether it is newly constructed or renovated.

The face material 3 in the present invention is a plate-like member fixed to the frame-like portion 2 and is a structural plywood, particle board, hard board, hard wood cement board, calcium silicate board used for a conventional bearing wall. Asbestos perlite board, flexible board, sizing board, gypsum board, ALC (lightweight cellular concrete), metal plate, synthetic resin plate and the like.
The external dimensions of the face material 3 may be the same as those used in the conventional load-bearing wall. Generally, one or a plurality of frame-shaped portions are used in combination of one or a plurality of horizontal stretches and a horizontal beam. However, a thin plate-like face material having a width of about 150 to 600 mm as in the conventional wood rubbing structure is appropriately arranged at intervals or in close contact, and arranged in a bowl shape. It is desirable to construct a vibration-proof and load-bearing wall having a soft structure made of wood by attaching at least two vertically between the columns and the inter-columns.

  Further, as shown in FIG. 7 (a), the face material 3 is provided only at the upper end of the frame-like portion 2, or the face material 3 is provided only at the joint as shown in FIG. 7 (b). The face material 3 may be disposed on a part of the portion 2. In this way, it is possible to impart elasticity to the bracing wall to make it difficult to break the bracing, to disperse stress to improve the wall magnification of the bracing wall, and to make the bracing wall a vibration-proof bearing wall.

The vibration-proof bearing wall structure 1 of the present invention is characterized in that a vibration-proofing tool 5 is interposed between the face material 3 and the fastening material 4 as shown in FIG. In the figure, 2 is a frame-like part, and 4a is a washer.
In the present invention, the vibration isolator 5 is made of a vibration isolating material. Anti-vibration materials are materials that can absorb and attenuate earthquake deformation (force) and impact and vibration energy by taking advantage of the elasticity and vibration absorption characteristics of the material. Synthetic materials such as natural rubber, butyl rubber and silicone rubber Examples thereof include foamed synthetic resins obtained by foaming rubber, elastomer resins, polypropylene, polyethylene, polycarbonate, etc., and these vibration-proof materials may be used alone or in combination with these materials. .
Commercially-available anti-vibration rubber can be used as such anti-vibration material, and for example, an anti-vibration pad (model number: KH-10, hardness: 60) manufactured by Kurashiki Kako is suitably used as the anti-vibration material in the present invention. can do.
Further, in the present invention, since the vibration isolator is interposed between the face material and the fastening material, the fastening portion of the face material is torn due to the concentrated load of the conventional thin fastening material (eg, N50 round nail). In addition to suppressing and eliminating defects such as seismic degradation caused by damage, bending, breakage, and disconnection of fastening materials, conventional rigid structure bearing walls have been improved to flexible structure bearing walls. The large deformations, impacts, and vibrations that have occurred in the buildings can be suppressed and mitigated. Moreover, this fastening structure can exhibit a stable fastening force over a long period of time by distributing the stress on the face material, the fastening material, and the fastening part on the structure housing side.

  In the present invention, the fastening material 4 can pass through the face material 3 or the vibration isolator 5 attached to the face material 3 such as a nail, a screw, or a screw, so that the vibration isolator 5 can be secured to the frame-like portion 2. It is an important member. In the present invention, it is possible to use a fastening material (typically N50 equivalent product made of soft iron) used for fastening the face material to the frame-like portion with a conventional bearing wall. It is preferable to use a screw nail having high toughness. An example of such a commercially available fastening material 4 is Kanesin Co., Ltd. bearing wall screw (model number: KS4041). It is also desirable to have these washers integrated with washers (washers) in advance. Examples of the washers that can be used include flat washers and disc spring washers that are commercially available. In addition, dish washers (see FIG. 1B) in which the edge of the flat washer is curved upward are used. For example, the edge portion of the washer 4a does not damage the edge portion of the face material 3 or the mounting hole 3a, so that it can be preferably used.

Or you may provide the washer (it is called the pushing fixing tool 4b) provided with the large overhang | projection part 4b1 in the downward direction as described in Fig.8 (a). If such a pushing fixture 4b is used, the overhanging portion 4b1 of the pushing fixture 4b is sunk into the vibration isolator 5 and a large internal pressure is generated in the vibration isolator 5, so that the vibration isolator 5 is strongly against the mounting hole 3a. It is possible to transmit the deformation force and vibration transmitted from the fastening material 4 to the vibration isolator more quickly and to prevent the vibration isolator 5 from coming out of the mounting hole 3a.
The outer diameter of the pushing fixture 4b is made smaller than the outer diameter of the vibration isolator 5 and larger than the head of the fastening member 5 so that it can be suitably pushed into the vibration isolator 5. The protruding height of the overhanging portion 4b1 is not particularly limited, but is preferably about 1/4 to 1/2 of the thickness of the vibration isolator 5.
Alternatively, as shown in FIG. 8B, a fastening material (referred to as a push-in fastening material 4c) provided with a large overhanging portion in the lower direction of the head may be used. The size of the head of the indentation fixing member 4c is approximately the same as that of the indentation fixture 4b.

  In the present invention, it is not necessary that the vibration isolator 5 is interposed between all the fixing materials 4 and the face material 3. The fastening material 4 having the vibration tool 5 interposed therebetween may be alternately provided, or only the main points of the load bearing wall structure (for example, the upper part of the frame-like part 2 and the vicinity of the lower joint part) are provided. It is also possible to fasten with a fastening material 4 in which is interposed. In particular, the central portion of the vertical portion of the frame-shaped portion 2 such as the column 2b and the inter-column 2d is not affected by the strain even when the bearing wall structure is distorted, so that it is secured without using the vibration isolator 5. In many cases, it does not matter. On the contrary, the vicinity of the upper and lower joints, the beam, and the base part are easily affected by large deformation force and distortion, so it is possible to install a vibration isolator that is larger than the center of the column and a vibration isolator having a high hardness of the vibration isolating material. desirable.

The band-shaped vibration isolator 5f may be provided in the portion that is fixed by the fixing material 4 without using the vibration isolator 5 as described above. In addition, in order to contrast with the strip | belt-shaped vibration isolator 5f, the normal vibration isolator 5 may be called the plug-shaped vibration isolator 5. FIG.
The band-shaped vibration isolator 5 f is a band-shaped member and is made of a vibration-proof material like the plug-shaped vibration isolator 5. The thickness of the band-shaped vibration isolator 5f needs to be at least 1 mm in order to obtain a suitable vibration isolating effect, and is preferably 3 to 10 mm. The width needs to be at least 15 mm in order to obtain a suitable vibration-proofing effect, and is desirably 30 to 50 mm.
As shown in FIG. 9, the band-shaped vibration isolator 5 f is mounted on the face material 3 and used so as to be fastened with the fastening material 4 from above. A method for attaching the band-shaped vibration isolator 5f to the face material 3 is not particularly limited, but adhesion using a pressure-sensitive adhesive or an adhesive is preferable. In order to make it easy to fix with the fixing material 4, it is preferable to form a pilot hole (not shown) at the position where the band-shaped vibration isolator 5 f is fixed with the fixing material 4.
The anti-vibration effect of the band-shaped anti-vibration device 5f is lower than that of the plug-type anti-vibration device 5, but it is preferable because the construction is simple and inexpensive and the effect of protecting the face material 3 and the fastening material 4 can be obtained.

In the structure in which the vibration isolator 5 is interposed between the face material 3 and the fastening material 4, for example, the mounting hole 3 a is made in the face material 3 and the vibration isolator 5 is attached to the mounting hole 3 a. The vibration isolator 5 is penetrated by the fastening material 4 and the face material 3 is fastened to the frame-like portion 2. Further, when mounting the vibration isolator 5 in the mounting hole 3a, it is also desirable to integrate them using an adhesive.
In addition, when fixing the face material 3 with the fixing material 4, as shown in FIG.1 (b), the face material 3 can also be hold | suppressed by the washer 4a whose diameter is larger than the mounting hole 3a. In this way, even when the vibration-proof bearing wall structure is greatly distorted, the face material 3 can be prevented from being lifted, and the vibration isolator 5 can be prevented from coming off the face material 3.
The shape of the mounting hole 3a is not particularly limited as long as the vibration isolator 5 can be mounted. However, in consideration of workability, the mounting hole 3a may have a circular shape as shown in FIGS. (C) As shown in (d), a tapered shape (conical frustum shape) having a large top surface and a small bottom surface is preferable.

The vibration isolator 5 is not particularly limited as long as it can be mounted in the mounting hole 3a. However, in consideration of the mounting property to the mounting hole 3a having the above shape, a columnar shape or a tapered shape (conical frustum shape) is used. preferable. In particular, as shown in FIG. 2 (a), the mounting hole 3a has the same cylindrical shape on the bottom surface side and the top surface side, and the shape of the vibration isolator 5 is smaller than the diameter of the mounting hole 3a on the bottom surface side 5b. A tapered shape (conical frustum shape) that is smaller and larger than the diameter of the mounting hole 3a on the upper surface side 5a is preferable because the vibration isolator 5 can be easily mounted in the mounting hole 3a.
The sizes of the mounting hole 3a and the vibration isolator 5 are not particularly limited as long as they can sufficiently absorb the impact, but preferably have a diameter of 5 mm or more, more preferably 8 mm or more, and particularly preferably 10 mm or more. May be appropriately selected from the relationship with the edge distance when the frame is fixed to the frame-shaped portion 2. The thickness of the vibration isolator 5 is not particularly limited, but is preferably equal to or greater than the depth of the mounting hole 3a. In particular, if the thickness of the vibration isolator 5 is about 1 mm thicker than the thickness of the mounting hole 3a, the vibration isolator 5 spreads sideways by pushing the vibration isolator 5 into the mounting hole 3a, and the inner surface of the mounting hole 3a. Since the vibration isolator 5 is unlikely to be detached from the mounting hole 3 even in the event of a strong earthquake or the like, it is preferable.
Further, in order to facilitate the penetration of the fixing material 4 into the vibration isolator 5, it is more preferable to provide a through hole 5e having a diameter of about 1 mm in the vicinity of the center of the vibration isolator 5 in advance because workability is improved.
Moreover, the method of preliminarily attaching the vibration isolator 5 and the fastening material 4 and integrating them in advance is also performed by sequentially fitting the vibration isolator 5 and the fastening material 4 in the mounting hole 3a at the site and then sequentially attaching the fastening material 4 to the frame-like portion 2. It is also possible to construct it according to the work procedure of driving, and it may be adopted as appropriate in the situation of a new construction or renovation site.

Moreover, as shown in FIG.2 (b), the collar part 5c larger than the aperture diameter of the mounting hole 3a can also be provided in the upper surface side 5a of the vibration isolator 5. FIG. In this way, even when the vibration-proof bearing wall is greatly distorted and the face material 3 is lifted from the frame-like portion 2, the flange portion 5c is engaged with the edge of the mounting hole 3a. The tool 5 cannot be removed from the mounting hole 3a.
At this time, since the fastening material 4 passes through the vibration isolator 5 and remains stuck into the frame-like portion 2, the vibration isolator 5 is stretched between the portion secured by the fastening material 4 and the flange portion 5c. The elastic recovery force is generated. Since the face material 3 and the frame-like portion 2 are pulled back by this elastic recovery force, the load-bearing wall structure 1 of the present invention immediately returns to its original shape.

Further, as shown in FIG. 2C, the vibration isolator 5 has a tapered shape (conical shape) that is small on the bottom surface side 5b and large on the top surface side 5a, and the mounting hole 3a is a taper on which the vibration isolator 5 can be fitted. Since the taper on the periphery of the vibration isolator 5 and the taper on the periphery of the mounting hole 3a are engaged with each other, the face material 3 is formed into a frame-like portion as in the case where the flange 5c is provided. The antivibration device 5 does not come off from the mounting hole 3a even when it floats up from 2, and the face material 3 that floats up immediately returns to its original shape.
As shown in FIG. 2 (d), if the vibration isolator 5 is tapered and the flange 5c is also provided, the vibration isolator 5 is further unlikely to fall out of the mounting hole 3a, and the face material 3 is also original. It becomes easy to return to the shape.

As shown in FIGS. 3A and 3B, the vibration isolator 5 can be mounted in the mounting hole 3a of the face material 3 in advance. In the present invention, the face material 3 on which the vibration isolator 5 is mounted in advance is referred to as an anti-vibration face material 53.
These anti-vibration surface materials 53 may be produced in a lump at a face material manufacturing factory or a pre-cut factory, and if this anti-vibration surface material 53 is used, the normal face material is stopped by the normal fixing material 4 at the construction site. The anti-vibration bearing wall structure 1 of the present invention can be obtained only by fixing the anti-vibration surface member 53 to the frame-like portion 2 in the same manner as that for wearing, which is preferable because workability is improved.

Moreover, as shown in FIG. 4A, the vibration isolator 5 according to the present invention can have the fastening material 4 penetrated in advance. In the present invention, the vibration isolator 5 through which the fixing material 4 is penetrated in advance is referred to as an anti-vibration fixing material 54.
Such an anti-vibration fixing material 54 is useful when the existing load-bearing wall structure is the vibration-proof load-bearing wall structure 1 of the present invention. That is, the mounting hole 3a is drilled at a point of the existing bearing wall, and the portion of the vibration isolator 5 in the anti-vibration fixing material 54 is fitted into the mounting hole 3a in that portion, and the portion of the fixing material 4 is fixed. The vibration-proof bearing wall structure 1 of the present invention can be obtained simply by driving or screwing into the frame-like portion 2.

In addition, as shown in FIG. 4 (b), a washer 4 a may be provided between the nail head of the fixing material 4 and the vibration isolator 5 in the vibration-proofing fixing material 54.
In addition, in this anti-vibration fastening material 54, it is sufficient that the fastening material 4 is configured to penetrate the vibration isolator 5 during use, and the fastening material 4 penetrates the vibration isolator 5 before use. You don't have to. That is, as shown in FIG. 4C, the tip of the vibration isolator 5 may be configured to be buried in the vibration isolator 5 before use. In this case, when the vibration isolator 5 is fitted into the mounting hole 3a, the fastening material 4 can be used as a gripping portion, so that it is easy to handle, and injuries caused by carelessly touching the tip of the fastening material 4 are also caused. Since it can prevent, it is preferable.

  As shown in FIG. 4D, the anti-vibration tool 5 in the anti-vibration attachment 54 can also be provided with an outer shell 5d. In this way, when the vibration isolator 5 is mounted in the mounting hole 3a, it is possible to prevent inconvenience that the vibration isolator 5 is bent unexpectedly, so that the mounting operation is facilitated. The shape of the outer shell 5d is not particularly limited, and an arbitrary configuration can be added in consideration of ease of mounting in the mounting hole 3a and engagement with the face material 3. For example, as shown in FIG. 4E, the flange portion 5c may be provided on the outer shell portion 5d.

  Even when the existing load-bearing wall structure is the vibration-proof load-bearing wall structure of the present invention, it is not always necessary to integrate the vibration-proofing tool 5 and the fastening material 4 in advance, that is, FIG. You may use each part of the vibration-proof attachment material 54 of (e) separately, respectively.

Hereinafter, the effects of the present invention will be described in detail based on experimental examples and comparative experimental examples, but the present invention is not limited to these.
Of the test cases provided for the experimental example and the comparative experimental example, the experimental example is a wooden frame bearing wall 1 having a large wall specification (1820 × 2730 mm) shown in FIG. 5, and a face member 3 is provided on one side of the frame-like portion 2. An anti-vibration load-bearing wall having a fixing structure in which a vibration isolator 5 is interposed between the face material 3 and the fixing material 4 is used. In the comparative experiment example, it is a conventional wooden wall bearing wall (1820 × 2730 mm) similar to FIG. 5, in which the face material is fixed directly with a fixing material without using a vibration isolator. A conventional load-bearing wall having a fastening structure was used. Using these test housings, the static column test-type in-plane shear test method and the dynamic test method simulated vibration test method shown in FIG. The performance difference is clarified.
The simulated seismic test method originally requires a long period of time to borrow a public seismic tester (or equivalent) that should be implemented. As an alternative method, the central city of Kobe during the Great Hanshin Awaji Earthquake (Seismic intensity) 7) In an earthquake-resistant house with an earthquake resistance rating of 2-3 or equivalent (estimated), in the case of water splashing out of the bathtub and disappearing in the bathtub installed on the second floor due to severe earthquake motion, A comparative vibration test of the vibration-proof bearing wall was conducted.

Experimental example: Preparation of vibration-proof bearing wall of the present invention A wooden frame vibration-proof bearing wall 1 having a large wall specification (1820 × 2730 mm) as shown in FIG. 5 was prepared.
The frame-shaped part 2 uses wood of JAS class 3 grade 105 × 180 mm as a shaft material for the beam 2a, and is a cedar structural material as a shaft material for the pillar 2b (including the intermediate pillar) and the base 2c. It was prepared using JAS Otsuchi Class 3 105 × 105 mm. Although not shown, the base 2c, the column 2b, and a fixed substrate for internal shear test (corresponding to a foundation, not shown) are fixed in a hole-down manner, and the beam 2a and the column 2b are fixed with a battledore bolt. ing.
As the face material 3, two JAS structural plywood special grades 2 (thickness 9 mm) having a width of 910 × 2730 mm were used. A mounting hole having a diameter of 20 mm is formed every 150 mm in the outer peripheral portion and the middle portion of the face material 3. However, a distance of 20 mm or more is maintained from the edge of both the face material and the shaft material to the center of the mounting hole.
As the vibration isolator, a vibration isolating pad (model number: KH-10, hardness: 60, thickness 12 mm) manufactured by Kurashiki Kako was punched into a cylindrical shape having a diameter of 20 mm. This vibration isolator is fitted into the mounting hole of the face material.
As the fastening material, a load-bearing wall screw made of Kanesin (model number: KS4041) is used, and in the same manner as the example shown in FIG. 1B, a washer 4a having a diameter of 22 mm and a thickness of 1 mm is used as a face material having a thickness of 9 mm. The vibration isolator was pushed in and fixed. The fastening material 4 penetrates the vibration isolator 5 and is screwed into the frame-like portion 2, so that the face material 3 is fastened to the frame-like portion 2.
Three anti-vibration load-bearing walls in this experimental example were prepared, and one surface was used for an in-plane shear test, which is a static test method, and two surfaces were used for a simulated vibration test simulating a dynamic test method.

Example of comparative experiment: Production of conventional bearing wall Without mounting holes, without mounting vibration isolator, according to the conventional method, using Kanesin's bearing screw (model number: KS4041) as a fastening material directly on the face material Except for the penetration, three bearing walls were prepared in the same manner as in the experimental example, and in the same manner as above, one surface was simulated as an in-plane shear test, which is a static test method, and two surfaces were simulated as a dynamic test method. Used for vibration test.

In-plane shear test:
(Anti-vibration bearing wall in the experimental example)
Test method for evaluating the strength of a load-bearing wall by a designated performance evaluation organization, which was established based on (8) of the Building Standard Act Construction Order Article 46, Paragraph 4, Table 1 Tokyo Plywood Industry Association / Tohoku Plywood Industry Association, structural plywood guide, 4. load bearing wall with structural plywood, 4.2 wall magnification by special approval, URL: http://www.ply-wood.net/data /pdf/tebiki_kouzou/10-12.pdf) The wall magnification was measured and evaluated. As a result, it was found that the anti-vibration bearing wall of the experimental example can withstand a horizontal load of about 5 kN / m and is a bearing wall equivalent to a wall magnification of 2.0.
Next, it was separately confirmed that the wall magnification when the hardness of the vibration-proof pad was changed to 70 was a load-bearing wall equivalent to 3.0. In this way, the selection and design of the wall magnification of the anti-vibration bearing wall depends on the properties of the anti-vibration material, the arrangement and number of anti-vibration devices, the external shape of the anti-vibration devices and attachment materials, the types of attachment materials, etc. It is possible to select and select as appropriate.
(Bearing wall of comparative experimental example)
As a result of the in-plane shear test using the same method as described above, it was found that the load-bearing wall of the comparative experimental example can withstand a horizontal load of about 6 kN / m and is a load-bearing wall having a wall magnification of 3.0.

Simulated vibration test:
As shown in FIGS. 6A and 6B, a simulated vibration test apparatus was assembled. The anti-vibration bearing wall 1 is connected to the foundation B (concrete) with an anchor bolt A (stainless steel, M12 × 450 mmL) having an excellent spring property at the base 2c. Roller C (Teflon (registered trademark) round bar: 50φ × 120 L) is interposed between the upper surface of the base B and a bearing portion provided on the base 2c. Around the anchor bolt A, SR sponge rubber G1 (hardness 50) is installed from the surface of the foundation B to a portion having a depth of 150 mm. With these structures, the base 2c is vibrated alternately in positive and negative directions to reproduce the seismic motion on the load-bearing wall, observe deformation and shaking, and the seismic deterioration due to damage and damage centered on the fixed part of the face material I grasped the state of progress.
As a vibration structure for seismic motion, a rammer R is provided on one end side of the base 2c via a vibration pad P (a plate member having a thickness of 50 mm made of foamed polyethylene (manufactured by Kaneka Co., Ltd., trade name: Eperan PP 30 times foamed product)). (Mikasa Sangyo Co., Ltd., electric tamping rammer, model number: MTX-M55) was installed. On the other end side of the base 2c, a restoring spring Sp is provided so that the pressing and vibrating behavior by the rammer R is repeated and restored. The impact stroke of the rammer R is 45 to 65 mm, and the impact number is 11.0 to 12.7 Hz / min.
A water tank T (length 600 x width 400 x height 400 mm) is placed as an alternative to the bathtub near the center of the upper part of the beam 2a (substitution of the floor on the second floor), and water is put to a height of 250 mm inside. It was. A weight W having a weight of 100 kg is placed near the right and left pillars 2b to amplify positive and negative vibrations and shaking inertial forces. Near the both ends of the beam 2a, roll prevention rollers Su of the test casing were provided to prevent rolls of the test casing other than the positive and negative directions.

(Vibration test of bearing wall of comparative experiment example 1)
Under the above conditions, first, in the bearing wall structure of the comparative experimental example, the Rammer R is actuated and pressed to gradually vibrate and amplify the foundation 2c (10 seconds), while the bearing wall is deformed, shaken and damaged. While observing the situation etc., the state in the water tank T was observed. The water in the tank T gradually shakes and the water in the tank T gradually starts to spill, and about 1/3 of the water is maintained (estimated seismic intensity: about 5 to 6). When shaken for 2 minutes, the shaking, impact and deformation of the face material 3 gradually increased, and the spilling phenomenon of water recurred and progressed as the proof stress decreased, so the test was stopped. In this state, the surface material 3 is broken or lifted around the fixing portion of the beam 2a and the base 2c, and a head-through phenomenon from the surface material 3 of the screw nail (made of Kanesin, strength screw) of the fixing material is sometimes seen. Although the surface material 3 did not peel off or fall off, the original shape of the load bearing wall was almost restored to the original shape, but when it was vibrated by human power, some positive and negative rattling was observed. In this state, it was judged that it was not possible to endure the aftershock that occurred after the earthquake and the second earthquake.

(Vibration test of bearing wall in comparative experiment example 2)
Based on the knowledge of ground motion test 1 (estimated seismic intensity: about 5 to 6), test 2 conditions (about 1/3 of the water spillage in the aquarium) were started using the test case of the bearing wall of the comparative experiment example. Starting as a condition and further amplifying the pressure and vibration, the water spill phenomenon became more intense, and most of the water was scattered outside the tank and spilled (7-10 seconds during this time). During this time, the shaking, impact, and deformation increase in intensity, and the progress of the breakage and breakage of the fastening part is visually observed, and the face material 3 is lifted and the partial peeling phenomenon starts, and the risk of peeling and dropping of the face material 3 The test was suspended due to the nature (estimated seismic intensity: about 7). In this state, the tearing of the fastening part of the face material and the heading-out of the screw nail proceed to the joint part including the beam 2a and the base 2c, and the frame-like part 2 of the face material 3 is also slightly inclined to the original shape. It did not return, and a large backlash was felt in the positive and negative directions compared to Test 1.
In this state, the function as a load-bearing wall could not be expected, and it was easily assumed that the house would eventually collapse.

(Vibration test 3 of the test example)
The vibration test of the vibration-proof bearing wall of the experimental example was performed under the conditions of the vibration test 1 of the comparative experimental example (estimated seismic intensity: about 5 to 6). After the start of vibration (about 5 seconds later), the water in the water tank T began to sway from side to side, but the water level undulated below the top surface of the water tank (several centimeters or less), but it did not scatter to the outside. The shaking, impact, and deformation of No. 3 were also smaller than Test 1 and felt calm (estimated seismic intensity: about 5). The situation of the face material 3 during vibration is that the deformation amount of the beam 2a and the base 2c is large, the center portion is swayed by a small deformation, and the positive and negative alternates centering on the fastening material penetrating the vibration isolator of the fastening portion. The state in which the vibration isolating portion was subjected to vibration isolation was confirmed visually by repeating elastic contraction deformation and elastic restoration deformation. Although the vibration was temporarily interrupted and damage to the fastening part (mounting hole of face material 3, vibration isolator, fastening material) was confirmed, although friction scratches due to the washer of the face material 3 and the fastening material were confirmed, It was observed that the wall magnification after the test was not reduced because the surface portion 3 was not lifted up, and was not damaged or damaged at the fastening part. After that, after the second 2 minutes of vibration, a third 2 minutes of vibration was performed, but no significant seismic deterioration was observed except that a part of the water in the water tank T was scattered. From this result, it was speculated that the reliability of the anti-vibration bearing wall is not greatly impaired even in the case of several earthquakes with a seismic intensity of about 5 to 6, and that the anti-vibration bearing wall has practicality.

(Vibration test of the vibration-proof bearing wall in the experimental example 4)
The vibration test of the vibration-proof bearing wall of the experimental example was performed under the condition of the vibration test 2 of the comparative experimental example (estimated seismic intensity: about 7).
After 10 seconds from the start of vibration, it was judged that the estimated seismic intensity of about 7 was reproduced, and the waving state of the water tank T, the vibration of the vibration-proof bearing wall, impact, and deformation were observed.
The waving on the surface of the water gradually increased, and a part of the scatter was observed from the upper part of the tank. However, the amount of scatter was about 1/5, and no further scatter occurred, and a large wave reaching the upper surface of the tank continued.
It was observed that the shaking, impact, and deformation of the face material 3 itself were smaller than the state of Test 2 and relaxed. The anti-vibration state of the anti-vibration tool at the fastening part was similar to that in Test 3, but it was confirmed that the movement was positive and negative alternating elastic deformation and elastic restoration. After stopping once, the visual inspection again showed that the mounting hole was slightly enlarged except for the damage of the washer trace, but it was judged that there was no significant earthquake-resistant deterioration, and the second vibration test was conducted. went. The shaking, impact, and deformation during the 2nd vibration for the 2nd time were not significantly changed compared to the 1st time, but a little water splashing was observed. After the stop, the face material 3 has returned to its original shape. Although the scuffing of the washer at the fastening part is enlarged, the face material 3 is not peeled off, and the through-hole of the fastening material of the vibration-proof rubber is slightly whitened and seems to be enlarged, with a little vibration-proof performance Although there is concern about the decline, it was speculated that it would be able to withstand earthquakes assumed after that (estimated seismic intensity of about 6-7).

  As shown in the above experimental examples and comparative experimental examples, in the static test method (in-plane shear test), the experimental example (wall magnification 2.0) is lower than the comparative experimental example (wall magnification 3.0). Despite being, the performance difference is reversed in the simulated vibration test, which demonstrates how the anti-vibration body wall of the present invention is resistant to actual earthquakes and suppresses and relieves deformation, shaking, impact and damage, Furthermore, it has been proved that the problem of seismic deterioration, which is regarded as the biggest defect of conventional bearing walls, is solved.

  As described above, the anti-vibration load-bearing wall structure of the present invention is a flexible structure as a whole with an anti-vibration tool made of an anti-vibration material interposed between the face material and the fastening material, so that deformation and shaking are suppressed and alleviated. Resistant to plastic deformation due to vibration and impact, and difficult to break. In addition, even if it is deformed due to vibration or impact, it immediately returns to its original shape, so it exhibits excellent anti-vibration properties against aftershocks and subsequent earthquakes (vibrations and shocks), and the earthquake resistance of buildings and structures. , Durability, security, and safety can be dramatically improved.

DESCRIPTION OF SYMBOLS 1 Vibration-proof load-bearing wall structure 2 Frame-like part 2a Beam 2b Column 2c Base 2d Inter-column 3 Face material 3a Mounting hole 4 Fastening material 4a Washer 4b Pushing fixture 4b1 Overhanging part 4c Pushing fastening material 5 5a Upper surface side 5b Bottom surface side 5c Gutter part 5d Outer shell part 5e Through-hole 5f Band-shaped vibration isolator 53 Anti-vibration surface material 54 Anti-vibration attachment material B Foundation A Anchor bolt N Nut G1, G2, G3 Rubber C Roller R Rammer P Excitation pad Sp Restoration spring T Water tank W Weight Su Roll prevention roller

Claims (9)

In the load-bearing wall structure in which the face material is disposed on at least one side of the frame-shaped portion in the structural frame and is fixed with a fixing material,
An anti-vibration load-bearing wall structure characterized in that an anti-vibration tool made of an anti-vibration material is interposed between the face material and the fastening material. A mounting hole for mounting a vibration isolator is drilled in the face material,
The anti-vibration load-bearing wall structure according to claim 1, wherein the fixing member is configured to pass through the vibration isolator mounted in the mounting hole and fix the face member and the frame-like portion.   The vibration-proof bearing wall structure according to claim 1 or 2, wherein the vibration isolator has a tapered shape that is smaller than the diameter of the mounting hole on the bottom surface side and larger than the diameter of the mounting hole on the upper surface side.   The anti-vibration load-bearing wall structure according to claim 1 or 2, wherein a flange portion larger than the diameter of the mounting hole is provided on the upper surface side of the anti-vibration tool.   3. The anti-vibration load-bearing wall structure according to claim 1, wherein the anti-vibration tool has a tapered shape that is small on the bottom surface side and large on the upper surface side, and the mounting hole has a taper shape to which the anti-vibration device can be fitted. .   6. The vibration-proof material is made of any one of synthetic rubber such as butyl rubber and silicon rubber, natural rubber, elastomer resin, and foamed synthetic resin, or a composite thereof. Anti-vibration load-bearing wall structure.   An anti-vibration surface material for a vibration-proof load-bearing wall structure, comprising: a face material having a mounting hole formed therein; and a vibration isolator made of an anti-vibration material and integrated in the mounting hole. .   An anti-vibration anchoring material for an anti-vibration load-bearing wall structure, comprising an anti-vibration instrument made of an anti-vibration material and an anchoring material penetrating the anti-vibration tool.   The anti-vibration fastening material according to claim 8, wherein an outer shell portion made of a hard member is provided at a peripheral edge portion of the vibration isolator.

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